Individual #aeronautics__aeronautic__astronautics  the theory and practice of navigation through air or space
  >part:  #avionics  science and technology of electronic systems and devices for aeronautics and astronautics: "avionics has become even more important with the development of the space program"
  >part of:  #physics__physic__physical_science__natural_philosophy__naturalphilosophy  the science of matter and energy and their interactions

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